If you’re looking for top of the line, I’d say millwauke, hilti, or makita. They are all real tough drills. But hitachi also makes a pretty good drill for quite a bit cheaper that will handle anything you need it for. But if price is really an issue, the cheapest brand I’d go with would be kobalt. They have a 5 year tool warranty and a 3 year battery warranty which you will need if you are using it daily. That being said, their new 24 volt drills and impacts are very torquey